The White 1999 Mechanical Sewing Machine is designed for heavy duty use. This machine can effortlessly sew through layers of denim as smoothly as it does with lightweight fabric such as silk. It is convenient for all darning, hemming, and sewing purposes. In addition, this sewing machine features a free-arm design that helps you sew sleeves, cuffs, and hems easily. Furthermore, the White 1999 Mechanical Sewing Machine has a one-dial stitch selector and a one-step buttonhole for convenient and trouble-free sewing.